Learning horn resp, need some advice. |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Ahh ok maybe this is the confusion as it's new version I have. So then my understanding of that function may be correct.
In which case how does hornresp know what segment of the horn the port terminates, surely it's going to have an effect. Edited by SouthwestCNC - 14 January 2017 at 6:52pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Ap1 into segment S2 for offset driver OD https://s29.postimg.org/z3v4hcs87/1st_post.png
For Nd into S1. Rear Ap where is S5. Later in SPL (acoustical power) you can specify distance(tools>>combined response) between S5 and end of a port. It may changed in new version though Edited by gen0me - 14 January 2017 at 7:02pm |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Oh ok. So with that you are able to simulate a port from driver to s1/s2 but at the same time loose the option to sim a vent in the rear chamber. That doesn't make a lot of sense to me. I'd have thought that kind of port into the throat could be simmed using vtc/atc to the same effect.
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5482 |
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Must confess I am not very good at keeping up with the newest version and features of HR. Didn't know this option was in it now. Impressive updating.
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fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1083 |
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' |Horn-Loaded Vented-Box Enclosure With Port Exit Located Inside Horn Mouth ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Select the tapped horn option and set Vrc, Lrc, Ap and Lpt > 0. Set L12 = 0.01 cm if the driver is not offset.' Here I have adjusted one of my attempts to hopefully make it clearer, I'm not getting accurate simmed results compared to measured results but I think this is the way that David intended it to be done. I first used the wizard in the drop down 'help' menu and chose tapped horn with rear chamber and 3 segments. |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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Great info. Thanks. Be interesting to hear if anyone gets any results with it. |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1083 |
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Could you post a link?
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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https://s29.postimg.org/82vgr7r07/temp.jpg
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fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1083 |
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Not sure what you mean about the wrong data, is that a pic from another thread?
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fatfreddiescat
Young Croc Joined: 15 October 2010 Location: N.E.Wales Status: Offline Points: 1083 |
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My cabs are ported at the throat, sims suggest the port length and area would be at 65Hz if it was a traditional reflex cab, but with having the full length of the horn attached, the tuning drops to 32Hz. On my cabs the port area is smaller than the throat area and is a hole cut in 18mm plywood. The problem with the hornresponse sims is that if I model the cab, it still gives a tuning as though the horn is not acting as a duct. Edited by fatfreddiescat - 15 January 2017 at 3:30pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Wrong data was on old versions of hornresp when Vrc was >0 The pic shows how to make ports at front and rear chamber in tapped horn. |
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